CN1837769A - Technique detection device for micro-channel heat exchanger - Google Patents
Technique detection device for micro-channel heat exchanger Download PDFInfo
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- CN1837769A CN1837769A CNA2006100260979A CN200610026097A CN1837769A CN 1837769 A CN1837769 A CN 1837769A CN A2006100260979 A CNA2006100260979 A CN A2006100260979A CN 200610026097 A CN200610026097 A CN 200610026097A CN 1837769 A CN1837769 A CN 1837769A
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Abstract
This device relates to a technique detection device for micro-channel heat exchanger, which comprises an upper gas source inlet pipe with one end connected to a flowmeter, a connecting pipe with one end connected to the flowmeter outlet and another end connected to the end of inlet connecting pipe that has another end connected to the inlet of the being-detected heat exchanger with outlet connected to the air; and assembling an imported pressure gauge on the connecting pipe. This invention avoids the serious effect to vehicle air conditioning system as the exchanger manufacture defect, and reduces cost greatly.
Description
Technical field
The present invention relates to the device in a kind of detection technique field, specifically is a kind of technique detection device of micro-channel heat exchanger, the technique detection device of the micro-channel heat exchanger when promptly using as cold-producing medium with carbon dioxide.
Background technology
CO
2Heat exchanger in the automotive air-conditioning system has experienced by the evolution of fin-tube type to micro-channel parallel flow heat exchanger.The hydraulic diameter of employed microchannel flat tube is usually less than 1mm in the micro-channel heat exchanger, and its advantage is: although its wall thickness is thinner, but can bear very high operating pressure.Another advantage is exactly that the surface in contact of its unit volume is long-pending quite big, thereby has quite high heat transfer coefficient.In addition, because CO
2Excellent rerum natura at aspects such as low, high density of gas phase of liquid/vapor density ratio and low liquid phase viscosities makes microchannel and CO
2Can cancel out each other separately shortcoming, thus make the size of heat interchanger significantly to reduce.Just because of the high heat-transfer performance of micro-channel tubes, and the air conditioning for automobiles heat interchanger is to the specific (special) requirements of terseness and low weight, thereby micro-channel heat exchanger is widely used at present with CO
2In the automotive air-conditioning system for cold-producing medium.
The structure of typical case's micro-channel heat exchanger is made up of joint, collector, microchannel flat tube, side plate, fin and blanking cover.With traditional be used for R134a be the aluminum alloy materials of cold-producing medium different be that collector belongs to 6000 type aluminium alloy containing magnesiums, and its surface does not cover brazing coating.Therefore,, must impose welding powder on the collector surface earlier, can adopt pad pasting, brushing or place methods such as weld-ring and realize for together with collector and the flat tube soldering of a series of microchannels.After sending into whole heat interchanger in the soldering oven, also must carry out strictness control, to guarantee before soldering is finished, not having too many magnesium component to be diffused into the collector surface to brazing temperature and programming rate.
Because collector is more much bigger than the thermal capacitance of microchannel flat tube, if welding technology is improper, may cause it seems from heat exchanger surface, Welding of Heat-exchanger is firm, attractive in appearance beautiful, and in fact penetrate into the two ends of microchannel flat tube too much, the phenomenon that causes micropore to be blocked on a large scale at the scolder on collector surface.At this moment, because the actual circulation hole count in the flat tube of microchannel diminishes a lot, cause refrigerant flow obviously to reduce, pressure drop significantly improves, and being enough to make this heat interchanger to become can not use.Judging like this, how that the micro-channel heat exchanger finished of welding is whether qualified just becomes very important.
Find through literature search prior art, publication number is that the utility model patent of CN26344721 is a kind of pick-up unit that is used for heat interchanger heat-transfer pipe single tube thermal property, and its structure is mainly formed by water pump, standard pipe, water flow meter, measured tube with by water pipe.It is merely able to be used to detect the thermal property of single heat exchange tube, obviously can not be applicable to the detection of whole micro-channel heat exchanger technology.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, designed a kind of technique detection device of micro-channel heat exchanger of simple possible, make its size that can detect flow and pressure drop in the micro-channel heat exchanger, make the whether qualified foundation that provides of the micro-channel heat exchanger finished for judging.This device has simple in structure, workable advantage.
The present invention is achieved by the following technical solutions, the present invention includes: upstream source of the gas admission line, flowmeter, connecting tube, inlet pressure gauge, inlet connecting branch, tested heat interchanger.Upstream source of the gas admission line, connecting tube are hard tube, and inlet connecting branch is a flexible pipe.The connected mode of inlet connecting branch and tested heat interchanger adopts the rapid-acting coupling form.One end of upstream source of the gas admission line links to each other with the import of flowmeter, the outlet of flowmeter is connected with an end of connecting tube, the other end of connecting tube is connected with an end of inlet connecting branch, the other end of inlet connecting branch is connected with the import of tested heat interchanger, and the outlet of tested heat interchanger communicates with atmosphere.Inlet pressure gauge is housed on connecting tube.Upstream source of the gas admission line, connecting tube adopt thread connecting mode with being connected of adjacent component.
The present invention can also comprise outlet connecting pipe, connecting tube and delivery gauge on the basis of said structure.Delivery gauge is arranged on the connecting tube, and the outlet of tested heat interchanger is connected with an end of outlet connecting pipe; The other end of outlet connecting pipe is connected with an end of connecting tube, and the other end of connecting tube communicates with atmosphere.Connecting tube adopts thread connecting mode with being connected of outlet connecting pipe.
Use the pick-up unit among the present invention that micro-channel heat exchanger is detected, can guarantee to meet fully after heat interchanger dispatches from the factory automotive air-conditioning system manufacturer's designing requirement, can not cause because of the manufacturing defect of micro-channel heat exchanger itself performance of automotive air-conditioning system is produced baneful influence.Simultaneously, behind the pick-up unit among the use the present invention of heat interchanger manufacturer, can assess the technological and manufacturing level of self, improve constantly technology, make the qualification rate of making the micro-channel heat exchanger product grow steadily, reduce manufacturing cost significantly.
Description of drawings
Fig. 1 is the typical micro-channel heat exchanger technique detection device structural representation among the present invention;
Fig. 2 is another version of the micro-channel heat exchanger technique detection device among the present invention.
Embodiment
As shown in Figure 1, the present invention includes: upstream source of the gas admission line 1, flowmeter 2, connecting tube 3, inlet pressure gauge 4, inlet connecting branch 5, tested heat interchanger 6.
One end of upstream source of the gas admission line 1 links to each other with the import of flowmeter 2; The outlet of flowmeter 2 is connected with an end of connecting tube 3, and the other end of connecting tube 3 is connected with an end of inlet connecting branch 5; The other end of inlet connecting branch 5 is connected with the import of tested heat interchanger 6, and the outlet of tested heat interchanger 6 communicates with atmosphere.Inlet pressure gauge 4 is housed on the connecting tube 3; Upstream source of the gas admission line 1, connecting tube 3 adopt hard tube, adopt thread connecting mode with being connected of adjacent component; Inlet connecting branch 5 adopts the form of metal hose or rubber hose, and the form that adopts rapid-acting coupling that is connected with tested heat interchanger 6 is beneficial to change tested heat interchanger.
Structure shown in Figure 2 is an another kind of avatar of the present invention, comprising: upstream source of the gas admission line 1, flowmeter 2, connecting tube 3, inlet pressure gauge 4, inlet connecting branch 5, tested heat interchanger 6, outlet connecting pipe 7, connecting tube 8 and delivery gauge 9.
One end of upstream source of the gas admission line 1 links to each other with the import of flowmeter 2; The outlet of flowmeter 2 is connected with an end of connecting tube 3, and the other end of connecting tube 3 is connected with an end of inlet connecting branch 5; The other end of inlet connecting branch 5 is connected with the import of tested heat interchanger 6; The outlet of tested heat interchanger 6 is connected with an end of outlet connecting pipe 7; The other end of outlet connecting pipe 7 is connected with an end of connecting tube 8, and the other end of connecting tube 8 communicates with atmosphere.Inlet pressure gauge 4 is housed on connecting tube 3; Delivery gauge 9 is housed on the connecting tube 8.Upstream source of the gas admission line 1, connecting tube 3, connecting tube 8 all adopt hard tube, adopt thread connecting mode with being connected of adjacent component; Inlet connecting branch 5, outlet connecting pipe 7 adopt the form of metal hose or rubber hose, and the form that adopts rapid-acting coupling that is connected with tested heat interchanger 6 is beneficial to change tested heat interchanger.
The engineering process of device shown in Figure 1 is: the nitrogen (N of upstream source of the gas
2) flow to flowmeter 2 through upstream source of the gas admission line 1, enter the connecting tube 3 that inlet pressure gauge 4 is housed after flowing out by flowmeter 2, enter tested heat interchanger 6 through inlet connecting branch 5 then, directly be discharged into atmosphere after flowing out by tested heat interchanger 6 outlets.Each functions of components is: flowmeter 2 can be measured the flow that flows through tested heat interchanger 6; Inlet pressure gauge 4 can be measured the stress level before the upstream source of the gas enters tested heat interchanger 6, and the pressure drop of tested heat interchanger 6 is the gauge pressure indicating value of inlet pressure gauge 4.
The course of work of device shown in Figure 2 is: the nitrogen (N of upstream source of the gas
2) flow to flowmeter 2 through upstream source of the gas admission line 1, by entering the connecting tube 3 that inlet pressure gauge 4 is housed after flowmeter 2 outflows, enter tested heat interchanger 6 through inlet connecting branch 5 then, enter the connecting tube 8 that delivery gauge 9 is housed after flowing out by outlet connecting pipe 7, be discharged into atmosphere at last.Each functions of components is as follows: flowmeter 2 can be measured the flow that flows through tested heat interchanger 6; Inlet pressure gauge 4 can be measured the stress level before the upstream source of the gas enters tested heat interchanger 6, and delivery gauge 9 can be measured the stress level that source of the gas flows out tested heat interchanger 6, and the pressure drop of tested heat interchanger 6 is the difference of inlet pressure gauge 4 and delivery gauge 9.
The principle of the pick-up unit among the present invention is: by nitrogen flow and the pressure drop level in the tested heat interchanger 6 passed through that records, can obtain the drag characteristic of the tested heat interchanger 6 under known mass flow, and then compare with reference value, the flow that then can judge this micro-channel heat exchanger whether is in normal range and whether pressure drop is reasonable.
Claims (5)
1, a kind of technique detection device of micro-channel heat exchanger, comprise: upstream source of the gas admission line (1), flowmeter (2), connecting tube (3), inlet pressure gauge (4), inlet connecting branch (5), tested heat interchanger (6), it is characterized in that: an end of upstream source of the gas admission line (1) links to each other with the import of flowmeter (2), the outlet of flowmeter (2) is connected with an end of connecting tube (3), the other end of connecting tube (3) is connected with an end of inlet connecting branch (5), the other end of inlet connecting branch (5) is connected with the import of tested heat interchanger (6), and the outlet of tested heat interchanger (6) communicates with atmosphere.
2, the technique detection device of micro-channel heat exchanger according to claim 1, it is characterized in that, described technique detection device has outlet connecting pipe (7), connecting tube (8) and delivery gauge (9), the outlet of tested heat interchanger (6) is connected with an end of outlet connecting pipe (7), the other end of outlet connecting pipe (7) is connected with an end of connecting tube (8), the other end of connecting tube (8) communicates with atmosphere, and delivery gauge (9) is arranged on the connecting tube (8).
3, the technique detection device of micro-channel heat exchanger according to claim 1 is characterized in that, upstream source of the gas admission line (1), connecting tube (3) are hard tube, and inlet connecting branch (5) is a flexible pipe.
4, the technique detection device of micro-channel heat exchanger according to claim 1 is characterized in that, inlet connecting branch (5) adopts the rapid-acting coupling form with the connected mode of tested heat interchanger (6).
According to the technique detection device of claim 1 or 2 described micro-channel heat exchangers, it is characterized in that 5, outlet connecting pipe (7) adopts the rapid-acting coupling form with the connected mode of tested heat interchanger (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100260979A CN1837769A (en) | 2006-04-27 | 2006-04-27 | Technique detection device for micro-channel heat exchanger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100260979A CN1837769A (en) | 2006-04-27 | 2006-04-27 | Technique detection device for micro-channel heat exchanger |
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| CN1837769A true CN1837769A (en) | 2006-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2006100260979A Pending CN1837769A (en) | 2006-04-27 | 2006-04-27 | Technique detection device for micro-channel heat exchanger |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344427A (en) * | 2013-07-17 | 2013-10-09 | 武汉亚普汽车塑料件有限公司 | Automobile fuel tank fuel filler pipe ventilation performance testing device |
| CN103575485A (en) * | 2013-10-22 | 2014-02-12 | 刘君华 | Microchannel heat exchanger flow characteristic detector and detection method |
| CN105547686A (en) * | 2016-02-05 | 2016-05-04 | 中国科学院物理研究所 | Method for determining microfluid channel conductivity |
| CN106525341A (en) * | 2016-10-11 | 2017-03-22 | 北京航空航天大学 | High-pressure gas detection joint for micro-diameter thin-walled tubes of heat exchangers |
-
2006
- 2006-04-27 CN CNA2006100260979A patent/CN1837769A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344427A (en) * | 2013-07-17 | 2013-10-09 | 武汉亚普汽车塑料件有限公司 | Automobile fuel tank fuel filler pipe ventilation performance testing device |
| CN103575485A (en) * | 2013-10-22 | 2014-02-12 | 刘君华 | Microchannel heat exchanger flow characteristic detector and detection method |
| CN103575485B (en) * | 2013-10-22 | 2016-06-08 | 刘君华 | Micro-channel heat exchanger flow characteristics detector and detection method |
| CN105547686A (en) * | 2016-02-05 | 2016-05-04 | 中国科学院物理研究所 | Method for determining microfluid channel conductivity |
| CN106525341A (en) * | 2016-10-11 | 2017-03-22 | 北京航空航天大学 | High-pressure gas detection joint for micro-diameter thin-walled tubes of heat exchangers |
| CN106525341B (en) * | 2016-10-11 | 2018-12-18 | 北京航空航天大学 | A kind of high pressure gas detection connector for the micro- diameter thin-wall tube of heat exchanger |
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